alt Hacker NewsViolence is an extreme failure state.
If your goal is to improve the system then you always want to move away from it.
Probably a reasonable justification would be self-defense, committing violence to stop worse violence. (Preemptive violence is not self-defense.)
But that is the kicker. As the sister comment said it matters a great deal what others do.
At some point a broken system enacts soft violence on people. So it isnt surprising people act out when they think survival is at stake. With healthcare, it really can be. But where is the line? When someone you know dies? 10 people?
It is messy.